THE INTERNAL ORGANS OF REPRODUCTION OF THE MALE 

 SAW-FLY, CIMBEX AMERICANA LEACH. 



Henry H. P. Severin and Harry C. M. Severix. 



(with plate XII.) 



HISTORICAL. 



The male organs of reproduction of various Hymenoptera 

 have been the object of study of a number of naturahsts. Swam- 

 merdam (35), Reaumur (25), Dufour (10), Leydig (21), Leuckart* 

 and more recently Cheshire (6), Koschewnikoff (20), Bordas (3), 

 and Michaelis (22) have all worked on the reproductive 

 organs of the drone bee. Schneider (31), in his general considera- 

 tions upon the development of the reproductive organs of insects, 

 has devoted some time to the Cynipidae and Ichneumonidae. 

 Kluge (19) has worked on the male genital organs of Vespa ger- 

 manica. Bordas (3) carried his research to several genera 

 belonging to various families of Hymenoptera often not closely 

 related. A number of other naturalists: — Andre (i), Schmiede- 

 knecht (30), Hoffer (17), Radoszkowski (26, 27, 28), VerhoefT (37) 

 and Zander (38, 39) have carried on their study on the external 

 genital apparatus of various Hymenoptera. 



A few authors have extended their investigations to different 

 species of the family Tenthredinidae. Burmeister (32) figures 

 and describes the external genital armature of Cimbex variabilis. 



Dufour (10) described the anatomical relation of the repro- 

 ductive organs of a number of species belonging to this family; 

 viz., Cephus pygmaeus, Tenthredo cincta, Tethredo rustica, and 

 Hylotoma enoides. In Cimbex he describes the large accessory 

 glands or glandulae mucosae as vesiculae seminales. In all the 

 figures of the various species of Tenthredinidae he has made this 

 same mistake. 



After Dufour, Leuckart has treated in a general way the male 

 reproductive organs of Anthidium and Athalia. Bordas (3) 

 quotes nearly in-extenso his work which we reproduce as follows : — ■ 

 "La structure des testicules consiste, chez les Anthidium, en une 

 serie de trois conduits seminiferes qui se continuent par un canal 

 deferent commun. Chez 1' Athalia, ils sont constitues par une 



* Paper not accessible 



196 



